Katlyn takes 20 minutes to walk from her house to the supermarket and back. After stepping outside her house, she takes 1 minute to tie her shoes and 2 minutes to check the route on her phone. How many trips can she take to the supermarket and back in 60 minutes?
The total time she spends on preparations and walking to the supermarket is 20 + 1 + 2 = <<20+1+2=23>>23 minutes.
Thus, she can make 60 / 23 = <<60/23=2.608695652173913>>2 trips to the supermarket and back. Answer: \boxed{2}.